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PERUPOK (Lophopetalum javanicum)
Trade Name
Perupok
Scientific Name
Lophopetalum javanicum (Zoll.) Turcz.
Family
Celastraceae
Common Names
Phuamphrao (Thailand); Sampol (Philippines); Abuab (Philippines); Perupok dual (Malaysia); Kachang rimba (Malaysia); Tatokwa (Indonesia); Mandalaksa (Indonesia); Madang-gambici (Indonesia); Song trang (Vietnam); Banati (India); Perupok (Indonesia); Perupok (Malaysia); Yemane-ni (Myanmar); Song salung (Thailand)
Scientific Name Synonyms
Lophopetalum toxicum Loher; Lophopetalum oblongifolium King; Lophopetalum fuscescens Kurz
Description Of The Tree
Botanical Description
It is a medium-sized to large tree up to 45 m tall. The bole is up to 100 cm in diameter. The buttresses are absent or small.
Natural Habitat
Lophopetalum javanicum is common in the lowland rain forests, growing often in periodically inundated areas or peat swamp forests, up to 1,400 m of altitude.
Natural Distribution
It is distributed from Thailand to New Guinea.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels in diagonal and/or radial pattern. Vessels exclusively solitary (over 90%). Occasionally tangential diameter of vessel lumina 100 micras or less. Tyloses common. Vestured pits. Vessels per mm2 5 to 20. Vessel-ray pits re Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. 3 to 4 cells per parenchyma strand. Occasionally 5 to 8 4 to 10 rays per mm (medium). Occasionally rays more than 10 per mm (abundant). Rays exclusively uniseriate. Silica bodies in the ray cells. Occasionally body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Occa Fibers with distinctly bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is not clearly differentiated. The heartwood is light straw-yellow or pink when fresh, light yellow-brown when dry.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
It is occasionally straight, mostly wavy.
Texture
The texture is from fine to medium.
Luster
The planned surface is moderately lustrous.
Natural Durability
It is non durable and rapidly attacked by insects if unprotected.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Silica Content
Silica Content: It is reported to contain 0.1% silica. Silica Value: 0.1
Resistance To Impregnation
The heartwood is rather difficult to treat with preservatives, but the sapwood is readily treatable.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.58
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.64
Total shrinkage Tangential (Saturated to 0%MC) (%)
5.2
Total shrinkage Radial (Saturated to 0%MC) (%)
4.1
Drying Defects
Ease of Drying: Air drying is reported to be fairly rapid, 13 mm thick boards take about 2 months and 38 mm thick boards about 3 months. Drying Defects: There is a slight risk of bowing. Major degrade during seasoning can be caused by moderately severe insect attack and stain.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.3
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
795
Stiffness (MOE) 12%MC (kgf/cm²)
126356
Compression parallel to fiber 12%MC (kgf/cm²)
438
Workability
Sawing
Sawing of this species is reported to be rather easy.
Rotary Veneer Cutting
This species is reported to be interesting for lamination.
Sliced Veneer
This species is reported to be interesting for lamination.
Machining
Machining of this species is reported to be easy.
Planing
This species is easy to plane.
Boring
It is easy to bore.
Nailing
Pre-boring is indispensable to avoid splitting.
Gluing
It has a good behavior in gluing.
Finishing
It gives a smooth finishing.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TOOLS, PACKING
General Housing
- 10 - Silica in Timbers
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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